FS8854-41CB [ETC]
350mA LDO Linear Regulator; 350毫安LDO线性稳压器
| 型号： | FS8854-41CB |
| 厂家： | 
ETC |
| 描述： | 350mA LDO Linear Regulator |
| 文件： | 总13页 (文件大小：598K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FS8854
350mA LDO Linear Regulator
General Description
The FS8854 is a low-dropout linear regulator that
operations in the input voltage range from +2.5V
to +6.5V and delivers 350mA output current.
Ordering Information
FS8854-xx x x
Package
Pin Out
2.GND 3.OUT
A : SOT-23
B : SOT-23
C : SOT-23
V : SOT-23
D : TO-92
E : TO-92
F : TO-92
1.IN
The high-accuracy output voltage is preset at an
internally trimmed voltage 2.5V or 3.3V. Other
output voltages can be mask-optioned from 1.3V
to 5.0V with 100mV increment, except
FS8854-29Cx which has 2.85V output voltage.
1.GND 2.IN
3.OUT
1.GND 2.OUT 3.IN
1.OUT 2.GND 3.IN
1.IN
2.GND 3.OUT
1.GND 2.IN
3.OUT
1.OUT 2.GND 3.IN
1.GND 2.OUT 3.IN
The FS8854 consist of a 1.25V bandgap
reference, an error amplifier, and a P-channel
pass transistor. Other features include
short-circuit protection and thermal shutdown
protection. The FS8854 devices are available in
TO-92, SOT-89 and SOT-23 packages.
W : TO-92
K : SOT-89
L : SOT-89
I : SOT-89
Y : SOT-89
1.IN
2.GND 3.OUT
1.GND 2.IN
3.OUT
1.OUT 2.GND 3.IN
1.GND 2.OUT 3.IN
Temperature Range
C : Commercial Standard
Features
P : Commercial Standard, Lead(Pb) Free and
Phosphorous(P) Free Package
ꢀ
Low dropout voltage 500mV at 350mA
(Typ.)
Output Voltage
ꢀ
Up to ±35mV output voltage accuracy
Preset at 2.5V, 3.3V
Mask option from 1.3V to 5.0V
Small output capacitor
Output current limit
Thermal overload shutdown
protection
13 : 1.3V
14 : 1.4V
15 : 1.5V
16 : 1.6V
17 : 1.7V
18 : 1.8V
19 : 1.9V
20 : 2.0V
21 : 2.1V
22 : 2.2V
23 : 2.3V
24 : 2.4V
25 : 2.5V
26 : 2.6V
27 : 2.7V
28 : 2.8V
29 : 2.85V
30 : 3.0V
31 : 3.1V
32 : 3.2V
33 : 3.3V
34 : 3.4V
35 : 3.5V
36 : 3.6V
37 : 3.7V
38 : 3.8V
39 : 3.9V
40 : 4.0V
41 : 4.1V
42 : 4.2V
43 : 4.3V
44 : 4.4V
45 : 4.5V
46 : 4.6V
47 : 4.7V
48 : 4.8V
49 : 4.9V
50 : 5.0V
ꢀ
ꢀ
ꢀ
ꢀ
TO-92, SOT-89 and SOT-23 Package
Applications
Note : Mask option output types are
available by order only.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Battery Powered Equipment
Palmtops
Portable Cameras and Video Recorders
Reference Voltage Sources
Post Regulator for Switching Power
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
1/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Pin Configurations
SOT-89
TO-92
Part No. Pin 1 Pin 2 Pin 3
Part No. Pin 1 Pin 2 Pin 3
FS8854
FS8854
FS8854
-xxxK
IN GND OUT
-xxxD
IN GND OUT
GND IN OUT
OUT GND IN
1
2
3
xxCxxxxx
FS8854
1
2
3
GND IN
OUT
FS8854
-xxxL
-xxxE
(BOTTOM VIEW)
FS8854
-xxxF
FS8854
-xxxW
OUT GND IN
FS8854
-xxxI
GND OUT
IN
FS8854
-xxxY
GND OUT
IN
Part No. Pin 1 Pin 2 Pin 3
SOT-23
3
FS8854
. . . . .
IN GND OUT
-xxxA
4xxx
. . . .W
FS8854
1
2
GND IN
OUT
IN
-xxxB
FS8854
-xxxC
GND OUT
FS8854
-xxxV
OUT GND IN
Package Marking Information
SOT-23
TO-92 & SOT-89
EX：FS8854-33CC
EX：FS8854-33CL
. . . . .
433C
Top Point：Lot No.
Bottom Point：Year
w : week, A~Z & A ~ Z
FS8854
33CLxxxx
xxxx：Date Code
. . .
W
EX：FS8854-33PC
EX：FS8854-33PL
. . . . .
FS8854
33PLxxxx
.
W
433C
. . .
Top Point：Lot No.
xxxx：Date Code
Bottom Point：Year
w : week, A~Z & A ~ Z
A dot after marking : Pb/P Free
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
2/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Pin Description
Part NO.
Symbol
GND
Description
FS8854-xxCA
FS8854-xxCB
FS8854-xxCC
FS8854-xxCV
FS8854-xxCD
FS8854-xxCE
FS8854-xxCF
FS8854-xxCW
FS8854-xxCK
FS8854-xxCL
FS8854-xxCI
FS8854-xxCY
Ground pin.
IN
Regulator input pin.
Regulator output pin.
OUT
IN is the regulator input pin. Supply voltage can range from 2.5V to 6.5V. Bypass with a 1µF capacitor to
GND.
OUT is the output voltage pin. Sources up to 350mA. Bypass with a 3.3µF capacitor to GND.
GND provides the reference for all voltages.
Functional Block Diagram
IN
Current Limit
Thermal
Protection
Shutdown
Logic
OUT
GND
R1
R2
1.25V
Bandgap
Reference
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
3/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Typical Application Circuit
Absolute Maximum Ratings
Input voltage VIN to GND ------------------------------------------------------------------------------------------------------7V
Output current limit, I(LIMIT) ------------------------------------------------------------------------------------------------ 0.6A
Continuous power dissipation, PD (∆T= TJ -TA = 100°C)
SOT-23 ---------------------------------------------------------------------------------------------------------------------------------------- 0.31W
SOT-89
TO-92
---------------------------------------------------------------------------------------------------------------------------------------- 0.55W
---------------------------------------------------------------------------------------------------------------------------------------- 0.55W
* The power dissipation values are based on the condition that junction temperature TJ and ambient
temperature TA difference is 100°C.
Junction Temperature, TJ ----------------------------------------------------------------------------------------------- +155°C
Storage temperature range, TSTG ---------------------------------------------------------------------- -55°C to +150°C
Operating junction temperature range ---------------------------------------------------------------- -40°C to +125°C
Lead temperature (soldering, 10sec) ------------------------------------------------------------------------------- 260°C
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only, and function operation of the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated
conditions for extended periods may affect device reliability.
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
4/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Electrical Characteristics
(TA=25℃, unless otherwise noted.)
Symbol
Parameter
Input Voltage
Output Voltage
Test Conditions
Min
Typ
Max
Unit
V
VIN
2.5
6.5
VOUT-
VOUT+
VOUT
VIN=VOUT+0.6V, IOUT=1mA
VOUT
V
0.035
0.035
VIN>VOUT+0.6V, VIN≦6.5V
ꢀ VOUT Output Voltage Accuracy
-35
350
+35
mV
mA
A
mA
µA
mV
mV
mV
IMAX
ILIMIT
ISC
Maximum Load Current
Current Limit
Short-Circuit Current
Ground Pin Current
0.6
160
90
145
480
600
VOUT=0V, VIN>VOUT+0.6V
ILOAD=0mA to 350mA, VIN=VOUT+0.6V
IOUT=100mA
IOUT=300mA
IOUT=350mA
140
65
120
400
500
0.2
IQ
VDROP
Dropout Voltage
ꢀVLINE
Line Regulation
VOUT+0.6V<VIN<6.5V, ILOAD=1mA
0.3
%/V
ꢀVLOAD Load Regulation
IOUT=0mA to 350mA
0.02
70
75
0.03 %/mA
Output Noise
F=1Hz to 10KHz, COUT=3.3µF
F=10KHz, COUT=3.3µF
µVRMS
dB
eN
PSRR
Ripple Rejection
Thermal Shutdown
TSD
155
20
°C
°C
Temperature
Thermal Shutdown
Hysteresis
THYS
SOT-23
SOT-89
TO-92
320
180
180
°C/W
°C/W
°C/W
Thermal Resistance
θJA
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
5/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Typical Operating Characteristics
(CIN=1µF , COUT=3.3µF, TA=+25℃, unless otherwise noted.)
GROUND PIN CURRENT vs. AMBIENT
TEMPERATURE
OUTPUT VOLTAGE vs. INPUT VOLTAGE
3.5
65
60
55
50
45
40
35
30
3
2.5
2
1mA
100mA
200mA
350mA
1.5
1
0.5
0
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
0
1
2
3
4
5
6
7
AMBIENT TEMPERATURE (℃)
INPUT VOLTAGE (V)
*EX：Model FS8854-33Cx
DROPOUT VOLTAGE vs. LOAD CURRENT
Ron vs. LOAD CURRENT
1.60
1.50
1.40
1.30
1.20
1.10
1.00
0.90
0.80
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
50
100
150
200
250
300
350
400
50
100
150
200
250
350
400
LOAD CURRENT (mA)
LOAD CURRENT (mA) 300
POWER SUPPLY REJECTION RATIO vs.
FREQUENCY
GND PIN CURRENT vs. LOAD CURRENT
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
60.00
58.00
56.00
54.00
52.00
50.00
48.00
46.00
0
1
50
100
150
200
250
300
350
400
0.01
0.1
1
10
100
1000
LOAD CURRENT (mA)
FREQUENCY (KHz)
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
6/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
OUTPUT VOLTAGE vs. AMBIENT
TEMPERATURE
GROUND PIN CURRENT vs. INPUT
VOLTAGE
3.36
3.34
3.32
3.3
80
70
60
50
40
30
20
10
0
3.28
3.26
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
0
1
2
3
4
5
6
7
AMBIENT TEMPERATURE (℃)
INPUT VOLTAGE (V)
LINE TRANSIENT (IOUT=0mA)
LINE TRANSIENT (IOUT=10mA)
5.0V
4.0V
5.0V
4.0V
VIN
VIN
CIN
CIN
VOUT
VOUT
1µF
1µF
COUT
3.3µF
COUT
3.3µF
50mV/div
50mV/div
LINE TRANSIENT (IOUT=200mA)
LINE TRANSIENT (IOUT=350mA)
5.0V
4.0V
5.0V
4.0V
VIN
VIN
VOUT
CIN
CIN
VOUT
1µF
1µF
COUT
COUT
3.3µF
3.3µF
50mV/div
50mV/div
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
7/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
LOAD TRANSIENT
LOAD TRANSIENT
100mA
0mA
200mA
100mA
IOUT
IOUT
VOUT
VOUT
CIN
CIN
1µF
1µF
COUT
3.3µF
COUT
3.3µF
50mV/div
50mV/div
LOAD TRANSIENT
LOAD TRANSIENT
350mA
200mA
350mA
0mA
IOUT
IOUT
CIN
CIN
VOUT
VOUT
1µF
1µF
COUT
3.3µF
COUT
3.3µF
50mV/div
100mV/div
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
8/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Detail Description
Current Limit
The FS8854 is a low-dropout linear regulator. The
device provides preset 2.5V and 3.3V output
voltages for output current up to 350mA. Other
mask options for special output voltages from 1.3V
to 5.0V with 100mV increment are also available.
As illustrated in function block diagram, it consists
of a 1.25V reference, error amplifier, P-channel
pass transistor and an internal feedback voltage
divider.
The FS8854 also include a fold back current limiter.
It monitors and controls the pass transistor’s gate
voltage, estimates the output current, and limits the
output current within 0.6A.
Thermal Overload Protection
Thermal overload protection limits total power
dissipation in the FS8854. When the junction
temperature exceeds TJ = +155°C, a thermal
sensor turns off the pass transistor, allowing the IC
to cool down. The thermal sensor turns the pass
transistor on again after the junction temperature
cools down by 20°C, resulting in a pulsed output
during continuous thermal overload conditions.
The 1.25V bandgap reference is connected to the
error amplifier, which compares this reference with
the feedback voltage and amplifies the voltage
difference. If the feedback voltage is lower than the
reference voltage, the pass-transistor gate is
pulled lower, which allows more current to pass to
the output pin and increases the output voltage. If
the feedback voltage is too high, the
pass-transistor gate is pulled up to decrease the
output voltage.
Thermal overload protection is designed to protect
the FS8854 in the event of fault conditions. For
continuous operation, the maximum operating
junction temperature rating of TJ = +125°C should
not be exceeded.
The output voltage is feedback through an internal
resistive divider connected to OUT pin. Additional
blocks include an output current limiter, thermal
sensor, and shutdown logic.
Operating Region and Power Dissipation
Maximum power dissipation of the FS8854
depends on the thermal resistance of the case and
circuit board, the temperature difference between
the die junction and ambient air, and the rate of
airflow. The power dissipation across the devices
is P = IOUT x (VIN-VOUT). The resulting maximum
power dissipation is:
Internal P-channel Pass Transistor
The FS8854 features a P-channel MOSFET pass
transistor. Unlike similar designs using PNP pass
transistors, P-channel MOSFETs require no base
drive, which reduces ground pin current.
PNP-based regulators also waste considerable
current in dropout when the pass transistor
saturates, and use high base-drive currents under
large loads. The FS8854 does not suffer from
these problems and consumes only 65µA (Typ.) of
ground pin current under heavy loads as well as in
dropout conditions.
TJ −TA
)
TJ −TA
( )
=
PMAX
=
θJC +θCA
θJA
Where (TJ-TA) is the temperature difference
between the FS8854 die junction and the
surrounding air, θJC is the thermal resistance of the
package chosen, and θCA is the thermal resistance
through the printed circuit board, copper traces
and other materials to the surrounding air. For
better heat-sinking, the copper area should be
equally shared between the IN, OUT, and GND
pins.
Output Voltage Selection
The FS8854 output voltage is preset at an
internally trimmed voltage 2.5V, 3.3V or can be
mask-optioned from 1.3V to 4.5V with 100mV
increment. The first two digits of part number suffix
identify the output voltage (see Ordering
Information). For example, the FS8854-33CL has
a preset 3.3V output voltage.
If the FS8854 uses a SOT-89 package and this
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
9/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
package is mounted on a double sided printed
circuit board with two square inches of copper
allocated for “heat spreading”, the resulting θJA is
180°C/W.
spreading”.
Input-Output Voltage
regulator’s minimum input-output voltage
A
Based on
a
maximum operating junction
differential, or dropout voltage, determines the
lowest usable supply voltage. In battery-powered
systems, this will determine the useful end-of-life
battery voltage. The FS8854 uses a P-channel
MOSFET pass transistor, its dropout voltage is a
function of drain-to-source on-resistance (RDS(ON))
multiplied by the load current.
temperature 125°C with an ambient of 25°C, the
maximum power dissipation will be:
(
TJ −TA
)
(
125 − 25
)
PMAX
=
=
= 0.555W
θJC +θCA
180
VDROPOUT = VIN-VOUT = RDS(ON) x IOUT
Thermal characteristics were measured using a
double sided board with 1” x 2” square inches of
copper area connected to the GND pin for “heat
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
10/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Package Outline
SOT-23
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
11/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
SOT-89
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
12/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
TO-92
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL: +886-2-2809-4742
FAX: +886-2-2809-4874
13/13
TD-0410025
Rev. 1.4
相关型号：
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